Illuminating composition.



applyin a ILLUMINA'KIZNG GOMPOSITION.

Specification of Letters Patent. Application filed September 4, 1 $09 Serial No. 516,307.

Patent Aug. 2, 191611..

To all whom it may concern:

Be it known that LFRANGIS Coon SIMSON,

a subject of the King of Great Britain and a resident of Halifax, in the Province oi Nova Scotia, Dominion of Canada, have invented a new and Improved Illuminatim Composition, of which the following is a lull, clear, and exact description.

My invention relates to illuminating compositions, that is, to compositions which are self-luminous in the dark, my more particular purpose being to provide a composition of this ty c olieruig superior advanta es regarding t e degree of light emitted an d havgp suitable form to be used in a variety of ations where the use of illuminating compositions is ordinarily diilicult or im ossible.

My improved compositions is, on or ordinary conditions of temperature, solid, but under temperatures somewhat higher than ordinary. tern natures of the atmosphere,

but considera 1 lowerthan the boiling point ofwater, it becomes a paste, and at a still higher tem rature, a liquid. This increases its usefu ness for the reason that by be readi y molded or forced into difierent forms. At ordinar temperatures it may be reduced to pow rand will retain its powdery form. Owing to this fact it may be used singly or by mixing various ingredients with it. 7 n the .form of powder or in the form of a plastic material, it is suitable for filling intoanyhollow transparent body. It ma also be made up in the, form of a mastic aving more or box resiliency and having sudlcient adhesiveness to caum it to cling to a, surface of glass, porcelain, or other polished surface. H

'TSome parts of the composition are essential and others are not essential except for certain purposes. The in redients used and their proportions by weight are as follows: p wax, 1000 parts; calcium sulfid, 1000 parts; barium sulfid, 1% arts; phosphorus, 1 part, more or less, as sulfate of lime, 20 parts, more-or less,es r liquid rubber, 100 parts, more or low, as desired. A small quantity ofsilioate of'a fthe amount being variable within wide i may be added to I rotect the mew-wk from the weather. e phorus, sulfate of lime, and liquid I notior all purposes tlal. The w of the phosphorus is to aid in the lamination and l o to up any 1 y s. which may accigentle heat, the composition can dentally be present in the composition, thereby protecting the other substances from undue oxidation. The pur ose of'the sulfate of lime is to harden die composition. The liquid rubber is for the purpose of rendering the composition adhesive. The various binders just'mentioned may be used separately.

have found thatby the use of the liquid rubber, as above stated, the entire composition can be made to adhere directly to a polished or glass surface, or to a surface of porcelain. This adheslveness is of considerable value as it enables the composition to be formed into letters, symbols, and the like,

and also enables the composition to be distributed iii any desired shape upon a surface to which ordinarily the application of an illuminating composition is very ditlicult. The paraliin wax serves as a carrier for the other ingredients and confers plasticity upon the composition. llts chiefpurpose, however, is to prevent oxidation of the other ingredients. In doing this it prolongs the li ht-giving power of the composition.

he composite substance above described ssesses a remarkable d ree of illuminatmg power. When, expose to a gentleiight,

as, for, instance, when freely exposed in an ordinary yoom with the windows open, but

with direct sunl ht excluded, the composition absorbs lig t or some other form of energy closely associated with light or with radiant heat, and afterward gives oil a beautiful glow which is very agreeable to the eye and light to attract attention in the darkness l have found upon actual trial that the composition above described has suficient illuminating power to be located readily in the dark by its own glow, and also that when used in the form of a owder and filled into any transparent vesse or behind -any solid transparent substance, the glow is not reduced in the. least I have found also that 4 a fibrous substance, such as a fabric of cotton, linen, hemp, or paper, if saturated or coated with the com glow almost as perfect y as if a thick block of the composition alone were employed.

While I refer to use arafin wax as a carrier, 1 nd that vase inc and various other petroleum products will answer the same purpose. I also find that refined petroloum and the various petroleum 1'. ucts make better carriers than some out sub- 'tion, exhibits the 1 stances; for the reason that materials allied to petroleum appear -to have less deleterious effect upon'theilluminating power of. the com o'sition.v -thus described my invention, I

s t I claim s new and desire to secure by Letters Patent The illuminating com osition herein der scribed, containing-the f0 lowing higredients 10 in the proportions-by weight stated: parafiin was 1000 m, calcium sulfid 1000 parts, barium $111 (1 100 parts, and a small proper-- tion of silicate of soda.

x In testimony whereof I have signed my" I J AS. ANDERSON. 

